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Semi-noble metal casing alloy for mouth repairing

A technique for oral prosthesis and semi-precious metal, which is applied in the field of precious metal casting alloys and semi-precious metal casting alloys for oral prosthetics, can solve the problems of high price, loss of visual effect of alloys, etc., and achieves low cost, uniform microstructure, and improved corrosion resistance. Effect

Inactive Publication Date: 2007-09-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also expensive, and because palladium has a bleaching effect on the alloy, the alloy turns light yellow or white, so that the alloy loses its good visual effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The alloy is prepared, and its composition is (percentage by weight): gold 56, silver 24.5, copper 13, palladium 5.2, zinc 0.7, platinum 0.5, iridium 0.1.

[0017] After vacuum melting or non-consumable arc melting, it can be melted into a uniform block alloy, and then processed into thin slices. After electric arc or induction melting, it is cast into various oral restorative finished products or test samples for mechanical properties. The sample or sample is heat-preserved at 700°C for 15 minutes for solution treatment; and then heat-preserved for 20 minutes at 300°C for aging treatment. The measured performance data of the alloy are: color: yellow, density: 13.7g / cm 3 , melting range: 880-945 ° C, yield strength (Hard): σ 0.2 =745±20MPa, breaking strength (Hard): σ b =820±20MPa, elongation (Hard): δ≥6%, Vickers hardness: Hv=250±10.

Embodiment 2

[0019] The alloy is prepared, and its composition is (weight %): gold 55, silver 23, copper 10, palladium 7, zinc 4, platinum 0.7, iridium 0.3.

[0020] After vacuum melting or non-consumable arc melting, it can be melted into a uniform block alloy, and then processed into thin slices. After electric arc or induction melting, it is cast into various oral restorative finished products or test samples for mechanical properties. The sample or sample is heat-preserved at 700°C for 15 minutes for solution treatment; and then heat-preserved for 15 minutes at 300°C for aging treatment. The measured performance data of the alloy are: color: yellow, density: 13.6g / cm3, Melting temperature range: 870-930°C, yield strength (Hard): σ 0.2 =720±20MPa, breaking strength (Hard): σ b =790±20MPa, elongation (Hard): δ≥8%, Vickers hardness: Hv=240±10.

Embodiment 3

[0022] The alloy is prepared, and its composition is (% by weight): 60 gold, 20 silver, 14 copper, 3 palladium, 1 zinc, 1.9 platinum, and 0.1 iridium.

[0023] After vacuum melting or non-consumable arc melting, it can be melted into a uniform block alloy, and then processed into thin slices. After electric arc or induction melting, it is cast into various oral restorative finished products or test samples for physical and chemical properties. The sample or sample is heat-preserved at 700°C for 15 minutes for solution treatment; and then heat-preserved for 30 minutes at 300°C for aging treatment. The measured performance data of the alloy are: color: yellow, density: 13.9g / cm 3 , Melting temperature range: 875-930 ° C, yield strength (Hard): σ 0.2 =740±20MPa, breaking strength (Hard): σ b =815±20MPa, elongation (Hard): δ≥7%, Vickers hardness: Hv=245±10.

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Abstract

A semi-noble metal casting alloy for prosthetic dentistry consists of Au 55.0-60.0wt%, silver 20.0-25.0wt%, Cu 10.0-14.0wt%, Pd 3-8.0wt%, Pt 0-3.0wt%, Zn 0-4.0, iridium 0-0.3. Its advantages include low cost, high mechanical and corrosion resistant performance.

Description

technical field [0001] The invention relates to a precious metal casting alloy, in particular to a semi-precious metal casting alloy for dental restoration, which is used in the field of dental materials. Background technique [0002] Gold and its alloys have a long history of application in stomatology. Initially, gold alloys used in dentistry generally consisted of three elements: gold-silver-copper. In foreign countries, since the beginning of the 20th century, people began to use platinum group elements (especially palladium and platinum) to replace gold, and formed a variety of series of dental gold alloys. The American Dental Association (ADA) and ISO 1562 divide gold alloys into four categories according to the properties (strength and hardness) of the alloys: the first category is low-strength alloys, mainly used for inlays; the second category is medium-strength alloys, Mainly used for inlays and onlays; the third category is high-strength alloys, suitable for onla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/02A61K6/04
Inventor 潘留国王健农丁冬雁
Owner SHANGHAI JIAO TONG UNIV
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